A measure of the total goods and services produced in a nation, GDP (Gross Domestic Product) remains the most widely used measure of a nation’s wealth and economic well-being, but economists, other social scientists and researchers have been working up more comprehensive alternative measures of wealth, well-being and quality of life based on the concept of “natural capital.” The United Nations University-International Human Development Program’s (UNU-IHDP) “Inclusive Wealth Indicator” goes beyond GDP to “reflect the sustainability of natural and human, as well as manufactured/economic capital.”